package com.tanhua.dubbo.server.api;

import cn.hutool.core.convert.Convert;
import cn.hutool.core.date.DateUtil;
import cn.hutool.core.util.ObjectUtil;
import com.alibaba.dubbo.config.annotation.Service;
import com.tanhua.dubbo.server.pojo.RecommendUser;
import com.tanhua.dubbo.server.pojo.Visitors;
import com.tanhua.dubbo.server.vo.PageInfo;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.PageRequest;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.redis.core.RedisTemplate;

import java.util.List;

@Service(version = "1.0.0")
public class VisitorsApiImpl implements VisitorsApi {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Autowired
    private RedisTemplate<String,String> redisTemplate;

    private static final String VISITOR_REDIS_KEY = "VISITOR_USER";

    @Override
    public String saveVisitor(Long userId, Long visitorUserId, String from) {
        //都不为空才行
        if(!ObjectUtil.isAllNotEmpty(userId,visitorUserId,from)){
            return null;
        }

        //查询访客用户在今天是否已经记录过，如果已经记录过，不再记录
        String today = DateUtil.today();
        Long minDate = DateUtil.parseDateTime(today + " 00:00:00").getTime();
        Long maxDate = DateUtil.parseDateTime(today + " 23:59:59").getTime();

        Query query = Query.query(Criteria.where("userId").is(userId)
                .and("visitorUserId").is(visitorUserId)
                .andOperator(Criteria.where("date").gte(minDate),
                        Criteria.where("date").lte(maxDate)
                )
        );
        long count = this.mongoTemplate.count(query, Visitors.class);

        //有记录则不添加记录
        if(count > 0){
            return null;
        }

        //无记录则新增一条记录
        Visitors visitors = new Visitors();
        visitors.setFrom(from);
        visitors.setVisitorUserId(visitorUserId);
        visitors.setUserId(userId);
        visitors.setDate(System.currentTimeMillis());
        visitors.setId(ObjectId.get());

        //存储数据
        this.mongoTemplate.save(visitors);

        return visitors.getId().toHexString();
    }

    //查询访客
    @Override
    public List<Visitors> queryMyVisitor(Long userId) {
        //上一次查询的时间
        Long date = Convert.toLong(this.redisTemplate.opsForHash().get(VISITOR_REDIS_KEY, String.valueOf(userId)));

        //分页 size 5
        PageRequest pageRequest = PageRequest.of(0,5, Sort.by(Sort.Order.desc("date")));
        Query query = Query.query(Criteria.where("userId").is(userId)).with(pageRequest);

        // 如果用户已经查询过列表，记录查询时间，后续查询需要按照这个时间往后查询
        if(ObjectUtil.isNotEmpty(date)){
            query.addCriteria(Criteria.where("date").gte(date));
        }
        return queryList(query,userId);

//        List<Visitors> visitorsList = mongoTemplate.find(query, Visitors.class);
//        //查询每个来访用户的得分
//        for (Visitors visitors : visitorsList) {
//            Query scoreQuery = Query.query(Criteria.where("toUserId").is(userId).and("userId").is(visitors.getVisitorUserId()));
//            RecommendUser recommendUser = mongoTemplate.findOne(scoreQuery, RecommendUser.class);
//            if(ObjectUtil.isNotEmpty(recommendUser)) {
//                visitors.setScore(recommendUser.getScore());
//            }else {
//                visitors.setScore(88d);
//            }
//        }
//        return visitorsList;
    }

    @Override
    public PageInfo<Visitors> topVisitor(Long userId, Integer page, Integer pageSize) {
        PageRequest pageRequest = PageRequest.of(page - 1, pageSize,
                Sort.by(Sort.Order.desc("date")));
        Query query = Query.query(Criteria.where("userId").is(userId)).with(pageRequest);
        List<Visitors> visitorsList = this.queryList(query, userId);

        PageInfo<Visitors> pageInfo = new PageInfo<>();
        pageInfo.setPageNum(page);
        pageInfo.setPageSize(pageSize);
        pageInfo.setRecords(visitorsList);

        //记录当前的时间到redis中，在首页查询时，就可以在这个时间之后查询了
        String redisKey = VISITOR_REDIS_KEY;
        String hashKey = String.valueOf(userId);
        String value = String.valueOf(System.currentTimeMillis());
        this.redisTemplate.opsForHash().put(redisKey, hashKey, value);

        return pageInfo;
    }

    private List<Visitors> queryList(Query query, Long userId){
        List<Visitors> visitorsList = this.mongoTemplate.find(query, Visitors.class);
        //查询每个来访用户的得分
        for (Visitors visitors : visitorsList) {

            Query queryScore = Query.query(Criteria.where("toUserId")
                    .is(userId).and("userId").is(visitors.getVisitorUserId())
            );
            RecommendUser recommendUser = this.mongoTemplate.findOne(queryScore, RecommendUser.class);
            if(ObjectUtil.isNotEmpty(recommendUser)){
                visitors.setScore(recommendUser.getScore());
            }else {
                //默认得分
                visitors.setScore(90d);
            }
        }

        return visitorsList;
    }
}
